The Dreamgirls alum will play Dr. Carrie Fox, a former friend and colleague of Joan's, When Joan (Lucy Liu) and Carrie disagree over a patient's critical diagnosis, Sherlock (Jonny Lee Miller) learns more about Joan's past and her decision to walk away from her surgical career.

Rose, whose other credits include The Good Wife and Private Practice, will appear in one episode of the new series, which premieres Thursday, Sept. 27 at 10/9c on CBS.